Little is known about Krissy except that she was a "real bitch" to Diane as a teenager and was one of her high school bullies.
According to Diane's crude sketches, Krissy was a human female with her hair tied in a ponytail and long bangs framing her face.
She wore a v-necked short-sleeved t-shirt, above the knee length skirt, knee-high socks, and shoes.
In Good Damage, Diane's writing process is shown through crude sketches in her imagination. Diane introduces herself to the readers and says she is a young girl living in Boston. She makes notes of where she needs to fix things later. Diane imagines her father saying he is very unsupportive of her.
She then flashes back to high school and her high school bully Krissy Keating. She makes a mental note to see if she can use Krissy's real name. Her vision of Krissy states she (Krissy) was a bitch to her in high school, but it’s likely because she was probably bullied herself.